Expansible reamer



L. E. BRUSH.

EXPANSIBLE REAMER.

APPLICATION FILED. JULY 21., I920.

Patented Mar. 14, 1922.

2 SHEETS-SHEET INVENTOR ATTORNEY UNITED STATES LEROY E. Bnosn, or ELGIN, ILLINOIS.

EXPANSIBLE REAMER.

Specification of Letters Patent.

Patented Mar. 14, 19.22.

Application filed July 27, 1920. Serial'No. 399,223.

T 0 all whom it may concern:

Be it known that I; Leno; Bntsn, a citizen of the United States, residing at Elgin, in the county of Kane and State of Illinois, have invented new and useful Improvements in Expansible R'ealmers. of which the following is aspecification.

This invention relates to tools. particularly to reamers, and has for its object the provision of a novel form of reamer designed particularly for cutting to the proper gage the openings within bearings for the crank shaft and connecting rods of nternal combustion engines.

An important object is the provision of a device of this character which is the same at bot-h ends, that is it has adjusting mechanism at the opposite ends which is simultaneously movable whereby to project the blades beyond the periphery of the stationaryor cage portion of the device to any desired extent within. of course, the limita- 'tions of the device.

Another object is the provision of a device of this character having novel means for adjustingthe positions of the blades and the adjusting means having locking mechanism associated therewith whereby to retain the parts in adjusted position.

An additional object is the provision of a device-of this character which will be cont paratively simple and inexpensive innianufacture, highly efficient in use, durable in service, and a' general improvement in the art. 7

With the above and other objects and advantages in view. the invention consists in the details of construction to be hereinafter more fully described and claimed, and illustrated in the accompanying drawings in which- Figure 1 is a side elevation of one form.

Figure 2 is an end view.

Figure 3 is a cross sectional view.

Figure 45 is a longitudinal sectional view.

Figure 5 is a face view of one of the adjusting wheels.

Figure 6 is a detail View of the handle member.

Figure 7 is a detail section showing the detent plunger.

Figure 8 is an elevation of another form.

Figure 9 is a longitudinal sectional view.

Referring more particularly to the drawings, the numeral 10 designates the body of the device which is formed as a cylindrical shell 11 which is hollow and which has formed upon its ends hollow circular heads 12 which are similar. These heads are formed with radial slots 13 communicating with the interior thereof. The shell 1]. is also formed with slots 13 registering with the slots 13. Y

Disposed within the cylindrical member 11 is a plurality of radially adjustable blade members 14, each of which is formed as a relatively long bar having right angularly extending ends 15 and also having longitudinal cuttin edges 16. The outer edges of these end portions 15 are notched, as shown at 17. The bar portions of the blades are located within the slots 13* in the hollow member 11 and the end portions 15 are located within the slots 13 with the cutting edges 16 projecting beyond the periphery of the shell or body 11.

In order to effect simultaneous movement of all the blade members so as to vary the diameter of the cut made by the blades, I provide a wheel or disk 18 located within one of the hollow heads 12 and having formed thereon a shaft 19 which extends centrally through the hollow member 11 and which has its other end squared, as shown at 20, and projecting beyond the other head .2. Disposed upon this squared portion 20 in the other head is a s milar wheel or disk 21 and the faces of these wheels which engage the notches 17 of the blades are formed with spiral ribs 22 which engage within the notches l7 and it will be seen that when a suitable key or the like is engaged upon the Fquared end 20 of the shaft 19 and the shaft 19 rotated with respect to the hollow portion 11, the blades will be moved radially outwardly or inwardly. depending upon the direction of rotation of the wheels. It is of course seen that one of the wheels must have a right hand spiral and the other a left hand spiral so that when they are both rotated in the same direction they will move the blades in the same direction.

When the desired adjustment is being made it is necessary to hold the parts against too free casual movement. In order to accomplish this I provide the periphery of each wheel 18 and 21 with a series of notches 23 and I also provide each head 12 with a radially movable plunger 24 operating with in a slot and having a point engaging the notches 23. Each plunger 24 is urged inwardly by a coil spring 25 held in position by a plug 26.

The outer portion of the hollow part of each' head 12 is internally threaded for the reception of a nut 27 which is threaded into thehead and each one of these nuts is formed with an elongated recess 28 for the reception of a suitable tool whereby it may be turned. One nutmember is provided with a hole revolubly' disposed about the squared end of the shaft19. Associated with each of these nuts 27 is a locking screw 29 which shown a modified form. In this form the body is of greater diameter than the body 10 of the other form and there are no heads, so that the body is of uniform diameter. The ends are recessed at 36, as in the previ one form, and the body is formed with radial slots 37 within which the blades 38 are disposed. The blades are of course shaped differently from the blades 14. In every I other respect the construction and operation of this form is the same as that of the first form; If desired, the blades 38 may be used in the first described form.

' In the operation of the device it will be i seen that the wheels 18 and 21 are radially adjustable to cause the cutting edges of the blades to protrude to a greater or less extent beyond the periphery of the shell or body 11 so as to vary the diameter of the cut to be made. The device is then grasped by the handle and rotated in the proper V construction, and arrangem'entof parts as will not depart from the spirit of'the invention or the scope of the subjoined claim.

Having thus described my invention, I claim: V d V A device of the character described comprising a hollow cylindrical body formed at its ends with recesses, the body being provided with radial slots, a plurality of blades each including a relatively long bar disposed within said slots and having right angularly extending ends, the outer edgesof the right angular ends of the bladesbeing formed with notches, a disk located within one recess and having a shaft extending centrally of said body and having its other end squared and protruding beyond the other recess, a disk within said other recess and disposed upon said squared portion of the shaft, the faces of said disks toward the blades being formed with spiral ribs engaging said notches, the ribs on one disk being a right spiral and the other being a left spiral, and means for holdingsaid disks against casual movement comprising a plunger slidable radially of each end of the body and spring-pressed into engagement with notches in the peripheryof each disk.

LEROY: E; BRUSH.

In testimony whereof I-aflix my signature. 

